Direct and indirect roles of Fgf3 and Fgf10 in innervation and vascularisation of the vertebrate hypothalamic neurohypophysis.

Direct and indirect roles of Fgf3 and Fgf10 in innervation and vascularisation of the vertebrate hypothalamic neurohypophysis.
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DOI:
10.1242/dev.080226
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发表时间:
2013-03
期刊:
Development (Cambridge, England)
影响因子:
--
通讯作者:
Placzek M
Placzek M
中科院分区:
其他
文献类型:
--
作者:
Liu F;Pogoda HM;Pearson CA;Ohyama K;Löhr H;Hammerschmidt M;Placzek M

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神经垂体是下丘脑-垂体轴的重要组成部分,是下丘脑神经激素释放到垂体毛细血管丛中的部位。因此,下丘脑轴突和毛细血管在胚胎发生过程中向形成神经垂体的生长对于未来成人体内平衡至关重要。通过对小鸡的离体分析以及对突变体和转基因斑马鱼的体内分析,我们发现从形成的神经垂体分泌的 Fgf10 和 Fgf3 对下丘脑神经分泌轴突发挥直接指导作用。同时,它们促进垂体血管形成,对内皮细胞产生早期直接影响,随后通过间接影响进行补充。总之,我们的研究提出了下丘脑-神经垂体轴的整合神经血液布线模型。
The neurohypophysis is a crucial component of the hypothalamo-pituitary axis, serving as the site of release of hypothalamic neurohormones into a plexus of hypophyseal capillaries. The growth of hypothalamic axons and capillaries to the forming neurohypophysis in embryogenesis is therefore crucial to future adult homeostasis. Using ex vivo analyses in chick and in vivo analyses in mutant and transgenic zebrafish, we show that Fgf10 and Fgf3 secreted from the forming neurohypophysis exert direct guidance effects on hypothalamic neurosecretory axons. Simultaneously, they promote hypophyseal vascularisation, exerting early direct effects on endothelial cells that are subsequently complemented by indirect effects. Together, our studies suggest a model for the integrated neurohemal wiring of the hypothalamo-neurohypophyseal axis.
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